Earlier this year, it was announced that “Attack of the Show” hostess Olivia Munn had joined the cast of “Iron Man 2.” And while the details of her role are still tightly guarded, Munn has revealed that her improv experience is what led director Jon Favreau to cast her.

“Jon Favreau was familiar with a lot of my work that I had done [and] the skits that I’ve put out,” Munn said during an appearance on Last Call With Carson Daly. “And [he] just thought that I can keep up with improv and [he] literally offered me the role.”

When asked about the amount of improv she needed to perform during the filiming of “Iron Man 2” set, Munn replied “Well, if you’ve got Robert Downey Jr. it’s going to be a lot. There’s a bunch of improv, over and over. It’s one of those things where you’re on set and you want other people to laugh and the crew to laugh. You get the extras and the contractors who’ve been there all day. If they’re laughing that’s a good feeling.”

Munn also shared an anecdote about shooting one of her scenes with Downey.

“One day I was doing a lot [of improvising] and [I kept] coming up with other stuff and at one point Robert just goes ‘Can we just stop for a second? Can we give Olivia a round of applause? Because she is rocking it right now.’ That’s beyond my dream ever and everyone just [clapped]. Afterwards, people were up coming up [and saying] ‘that was really great!’ I was so happy.”

With the amount of improv in ‘Iron Man 2’, should Robert Downey Jr. and Jon Favreau receive writing credit as well? Are you excited to hear about Munn’s on set experience? Let us know what you’re thinking in the comment section or on Twitter!